1 /*****************************************************************************
2 * libc.c: Extra libc function for some systems.
3 *****************************************************************************
4 * Copyright (C) 2002 VideoLAN
7 * Authors: Jon Lech Johansen <jon-vl@nanocrew.net>
8 * Samuel Hocevar <sam@zoy.org>
9 * Gildas Bazin <gbazin@videolan.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
25 #include <string.h> /* strdup() */
36 #if defined(HAVE_ICONV)
40 /*****************************************************************************
41 * getenv: just in case, but it should never be called
42 *****************************************************************************/
43 #if !defined( HAVE_GETENV )
44 char *vlc_getenv( const char *name )
50 /*****************************************************************************
51 * strdup: returns a malloc'd copy of a string
52 *****************************************************************************/
53 #if !defined( HAVE_STRDUP )
54 char *vlc_strdup( const char *string )
56 return strndup( string, strlen( string ) );
60 /*****************************************************************************
61 * strndup: returns a malloc'd copy of at most n bytes of string
62 * Does anyone know whether or not it will be present in Jaguar?
63 *****************************************************************************/
64 #if !defined( HAVE_STRNDUP )
65 char *vlc_strndup( const char *string, size_t n )
68 size_t len = strlen( string );
70 len = __MIN( len, n );
71 psz = (char*)malloc( len + 1 );
75 memcpy( (void*)psz, (const void*)string, len );
83 /*****************************************************************************
84 * strcasecmp: compare two strings ignoring case
85 *****************************************************************************/
86 #if !defined( HAVE_STRCASECMP ) && !defined( HAVE_STRICMP )
87 int vlc_strcasecmp( const char *s1, const char *s2 )
90 if( !s1 || !s2 ) return -1;
92 while( !i_delta && *s1 && *s2 )
96 if( *s1 >= 'A' && *s1 <= 'Z' )
98 i_delta -= ('A' - 'a');
101 if( *s2 >= 'A' && *s2 <= 'Z' )
103 i_delta += ('A' - 'a');
109 if( !i_delta && (*s1 || *s2) ) i_delta = *s1 ? 1 : -1;
115 /*****************************************************************************
116 * strncasecmp: compare n chars from two strings ignoring case
117 *****************************************************************************/
118 #if !defined( HAVE_STRNCASECMP ) && !defined( HAVE_STRNICMP )
119 int vlc_strncasecmp( const char *s1, const char *s2, size_t n )
122 if( !s1 || !s2 ) return -1;
124 while( n-- && !i_delta && *s1 && *s2 )
128 if( *s1 >= 'A' && *s1 <= 'Z' )
130 i_delta -= 'A' - 'a';
133 if( *s2 >= 'A' && *s2 <= 'Z' )
135 i_delta += 'A' - 'a';
141 if( !n && !i_delta && (*s1 || *s2) ) i_delta = *s1 ? 1 : -1;
147 /******************************************************************************
148 * strcasestr: find a substring (little) in another substring (big)
149 * Case sensitive. Return NULL if not found, return big if little == null
150 *****************************************************************************/
151 #if !defined( HAVE_STRCASESTR ) && !defined( HAVE_STRISTR )
152 char * vlc_strcasestr( const char *psz_big, const char *psz_little )
154 char *p_pos = (char *)psz_big;
156 if( !psz_big || !psz_little || !*psz_little ) return p_pos;
160 if( toupper( *p_pos ) == toupper( *psz_little ) )
162 char * psz_cur1 = p_pos + 1;
163 char * psz_cur2 = (char *)psz_little + 1;
164 while( *psz_cur1 && *psz_cur2 &&
165 toupper( *psz_cur1 ) == toupper( *psz_cur2 ) )
170 if( !*psz_cur2 ) return p_pos;
178 /*****************************************************************************
180 *****************************************************************************/
181 #if !defined(HAVE_VASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
182 int vlc_vasprintf(char **strp, const char *fmt, va_list ap)
184 /* Guess we need no more than 100 bytes. */
186 char *p = malloc( i_size );
197 /* Try to print in the allocated space. */
198 n = vsnprintf( p, i_size, fmt, ap );
200 /* If that worked, return the string. */
201 if (n > -1 && n < i_size)
206 /* Else try again with more space. */
207 if (n > -1) /* glibc 2.1 */
209 i_size = n+1; /* precisely what is needed */
213 i_size *= 2; /* twice the old size */
215 if( (p = realloc( p, i_size ) ) == NULL)
224 /*****************************************************************************
226 *****************************************************************************/
227 #if !defined(HAVE_ASPRINTF) || defined(SYS_DARWIN) || defined(SYS_BEOS)
228 int vlc_asprintf( char **strp, const char *fmt, ... )
233 va_start( args, fmt );
234 i_ret = vasprintf( strp, fmt, args );
241 /*****************************************************************************
242 * atof: convert a string to a double.
243 *****************************************************************************/
244 #if !defined( HAVE_ATOF )
245 double vlc_atof( const char *nptr )
249 int i_len = strlen( nptr ) + 1;
251 psz_tmp = malloc( i_len * sizeof(wchar_t) );
252 MultiByteToWideChar( CP_ACP, 0, nptr, -1, psz_tmp, i_len );
253 f_result = wcstod( psz_tmp, NULL );
260 /*****************************************************************************
261 * strtoll: convert a string to a 64 bits int.
262 *****************************************************************************/
263 #if !defined( HAVE_STRTOLL )
264 int64_t vlc_strtoll( const char *nptr, char **endptr, int base )
267 int sign = 1, newbase = base ? base : 10;
269 while( isspace(*nptr) ) nptr++;
277 /* Try to detect base */
290 if( base && newbase != base )
292 if( endptr ) *endptr = (char *)nptr;
299 while( *nptr >= '0' && *nptr <= '9' )
302 i_value += ( *nptr++ - '0' );
304 if( endptr ) *endptr = (char *)nptr;
308 while( (*nptr >= '0' && *nptr <= '9') ||
309 (*nptr >= 'a' && *nptr <= 'f') ||
310 (*nptr >= 'A' && *nptr <= 'F') )
313 if(*nptr >= '0' && *nptr <= '9') i_valc = *nptr - '0';
314 else if(*nptr >= 'a' && *nptr <= 'f') i_valc = *nptr - 'a' +10;
315 else if(*nptr >= 'A' && *nptr <= 'F') i_valc = *nptr - 'A' +10;
320 if( endptr ) *endptr = (char *)nptr;
324 i_value = strtol( nptr, endptr, newbase );
328 return i_value * sign;
332 /*****************************************************************************
333 * atoll: convert a string to a 64 bits int.
334 *****************************************************************************/
335 #if !defined( HAVE_ATOLL )
336 int64_t vlc_atoll( const char *nptr )
338 return strtoll( nptr, (char **)NULL, 10 );
342 /*****************************************************************************
343 * dgettext: gettext for plugins.
344 *****************************************************************************/
345 char *vlc_dgettext( const char *package, const char *msgid )
347 #if defined( ENABLE_NLS ) \
348 && ( defined(HAVE_GETTEXT) || defined(HAVE_INCLUDED_GETTEXT) )
349 return dgettext( package, msgid );
351 return (char *)msgid;
355 /*****************************************************************************
356 * count_utf8_string: returns the number of characters in the string.
357 *****************************************************************************/
358 static int count_utf8_string( const char *psz_string )
360 int i = 0, i_count = 0;
361 while( psz_string[ i ] != 0 )
363 if( ((unsigned char *)psz_string)[ i ] < 0x80UL ) i_count++;
369 /*****************************************************************************
370 * wraptext: inserts \n at convenient places to wrap the text.
371 * Returns the modified string in a new buffer.
372 *****************************************************************************/
373 char *vlc_wraptext( const char *psz_text, int i_line, vlc_bool_t b_utf8 )
376 char *psz_line, *psz_new_text;
378 psz_line = psz_new_text = strdup( psz_text );
381 i_len = count_utf8_string( psz_text );
383 i_len = strlen( psz_text );
385 while( i_len > i_line )
387 /* Look if there is a newline somewhere. */
388 char *psz_parser = psz_line;
390 while( i_count <= i_line && *psz_parser != '\n' )
394 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
399 if( *psz_parser == '\n' )
401 i_len -= (i_count + 1);
402 psz_line = psz_parser + 1;
406 /* Find the furthest space. */
407 while( psz_parser > psz_line && *psz_parser != ' ' )
411 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser--;
416 if( *psz_parser == ' ' )
419 i_len -= (i_count + 1);
420 psz_line = psz_parser + 1;
424 /* Wrapping has failed. Find the first space or newline */
425 while( i_count < i_len && *psz_parser != ' ' && *psz_parser != '\n' )
429 while( *((unsigned char *)psz_parser) >= 0x80UL ) psz_parser++;
434 if( i_count < i_len ) *psz_parser = '\n';
435 i_len -= (i_count + 1);
436 psz_line = psz_parser + 1;
442 /*****************************************************************************
444 *****************************************************************************/
445 vlc_iconv_t vlc_iconv_open( const char *tocode, const char *fromcode )
447 #if defined(HAVE_ICONV)
448 return iconv_open( tocode, fromcode );
454 size_t vlc_iconv( vlc_iconv_t cd, char **inbuf, size_t *inbytesleft,
455 char **outbuf, size_t *outbytesleft )
457 #if defined(HAVE_ICONV)
458 return iconv( cd, inbuf, inbytesleft, outbuf, outbytesleft );
460 int i_bytes = __MIN(*inbytesleft, *outbytesleft);
461 if( !inbuf || !outbuf || !i_bytes ) return (size_t)(-1);
462 memcpy( *outbuf, *inbuf, i_bytes );
465 inbytesleft -= i_bytes;
466 outbytesleft -= i_bytes;
471 int vlc_iconv_close( vlc_iconv_t cd )
473 #if defined(HAVE_ICONV)
474 return iconv_close( cd );
480 /*****************************************************************************
482 * (adapted from libavcodec, author Michael Niedermayer <michaelni@gmx.at>)
483 *****************************************************************************/
484 vlc_bool_t vlc_reduce( int *pi_dst_nom, int *pi_dst_den,
485 int64_t i_nom, int64_t i_den, int64_t i_max )
487 vlc_bool_t b_exact = 1, b_sign = 0;
509 i_gcd = GCD( i_nom, i_den );
513 if( i_max == 0 ) i_max = I64C(0xFFFFFFFF);
515 if( i_nom > i_max || i_den > i_max )
517 int i_a0_num = 0, i_a0_den = 1, i_a1_num = 1, i_a1_den = 0;
522 int64_t i_x = i_nom / i_den;
523 int64_t i_a2n = i_x * i_a1_num + i_a0_num;
524 int64_t i_a2d = i_x * i_a1_den + i_a0_den;
526 if( i_a2n > i_max || i_a2d > i_max ) break;
530 i_a0_num = i_a1_num; i_a0_den = i_a1_den;
531 i_a1_num = i_a2n; i_a1_den = i_a2d;
532 if( i_nom == 0 ) break;
533 i_x = i_nom; i_nom = i_den; i_den = i_x;
539 if( b_sign ) i_nom = - i_nom;
547 /*************************************************************************
548 * vlc_parse_cmdline: Command line parsing into elements.
550 * The command line is composed of space/tab separated arguments.
551 * Quotes can be used as argument delimiters and a backslash can be used to
553 *************************************************************************/
554 static void find_end_quote( char **s, char **ppsz_parser, int i_quote )
563 (*ppsz_parser)++; (*s)++;
566 else if( **s == '"' || **s == '\'' )
568 /* Preceeded by a number of '\' which we erase. */
569 *ppsz_parser -= i_bcount / 2;
572 /* '\\' followed by a '"' or '\'' */
575 (*ppsz_parser)++; (*s)++;
587 /* Different quoting */
590 (*ppsz_parser)++; (*s)++;
591 find_end_quote( s, ppsz_parser, i_quote );
593 (*ppsz_parser)++; (*s)++;
600 /* A regular character */
602 (*ppsz_parser)++; (*s)++;
608 char **vlc_parse_cmdline( const char *psz_cmdline, int *i_args )
612 char *s, *psz_parser, *psz_arg, *psz_orig;
615 if( !psz_cmdline ) return 0;
616 psz_orig = strdup( psz_cmdline );
617 psz_arg = psz_parser = s = psz_orig;
621 if( *s == '\t' || *s == ' ' )
623 /* We have a complete argument */
625 TAB_APPEND( argc, argv, strdup(psz_arg) );
627 /* Skip trailing spaces/tabs */
628 do{ s++; } while( *s == '\t' || *s == ' ' );
631 psz_arg = psz_parser = s;
634 else if( *s == '\\' )
636 *psz_parser++ = *s++;
639 else if( *s == '"' || *s == '\'' )
641 if( ( i_bcount & 1 ) == 0 )
643 /* Preceeded by an even number of '\', this is half that
644 * number of '\', plus a quote which we erase. */
646 psz_parser -= i_bcount / 2;
648 find_end_quote( &s, &psz_parser, i_quote );
653 /* Preceeded by an odd number of '\', this is half that
654 * number of '\' followed by a '"' */
655 psz_parser = psz_parser - i_bcount/2 - 1;
663 /* A regular character */
664 *psz_parser++ = *s++;
669 /* Take care of the last arg */
673 TAB_APPEND( argc, argv, strdup(psz_arg) );
676 if( i_args ) *i_args = argc;